Nigel lost all my contacts from my phone, so can not contact/call you, Im not sure your getting the PM's.
so hope this is ok.
1) The crank - yes can help, no problem.
2) The thread - we have a set - tap is a 5/16ths BSW- you need two, a starter and plugm very difficult to get started without a problem, we usually do it by starting it off in the pillar drill chuck, with an angle or rotating table
one question, we spoke about the head, can help you m/c it, as per our discussion
regards Derek